ATP synthesis in cell requires from Biology Cell : The Unit of L

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 Multiple Choice QuestionsMultiple Choice Questions

331.

Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?

  • Bacteria - Lysozyme

  • Plant cells - Cellulase

  • Algae - Methylase

  • Fungi - Chitinase


332.

The Golgi complex plays a major role

  • in trapping the light and transforming it into chemical energy

  • in digesting proteins and carbohydrates

  • as energy transferring organelles

  • in post translational modification of proteins and glycosidation of lipids


333.

Which one of the following organelle in the figure correctly matches with its function?

  • Rough endoplasmic reticulum, formation of glycoproteins

  • Golgi apparatus, protein synthesis

  • Golgi apparatus, formation of glycolipids

  • Rough endoplasmic reticulum, protein synthesis


334.

The primary cell wall is mainly made up of

  • lignin

  • pectin

  • cellulose

  • protein


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335.

Which of the following is always absent in prokaryotic cells?

  • Ribosome

  • Mitochondria

  • DNA

  • Cell wall


336.

Objects less than 0.2 μm in size cannot be see an under light microscope because

  • the wave length of visible light is 3900- 7800 Å

  • only two types of lenses are used

  • maximum magnifying power of ocular lens is 20 X

  • maximum magnifying power of objective lens is 100 X


337.

Pseudopodia are produced by

  • plasma cell

  • mast cell

  • adipose cell

  • fibroblast cell


338.

The apoplast is located

  • outside the plasma membrane

  • in the entire cytosol

  • on both sides of plasma membrane

  • in the plastidial content


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339.

ATP synthesis in cell requires

  • H+ gradient across the membrane

  • K+ gradient across the membrane

  • PO4 3- gradient across the membrane

  • Ca2+ gradient across the membrane


A.

H+ gradient across the membrane

ATP synthesis takes place by the process of chemiosmosis, where ATP is generated via a proton (H+) gradient across the membrane.

Actions of the proton pump is the driving force of ATP. The proton pump pumps H+ ions across the membrane. It establishes a chemical gradient; the protons are high in the intermembrane space than in the matrix. Pumping of the H+ ions across the membrane makes the intermembrane space more positively charged as compared to the matrix. Hence, this is strong electrochemical gradient which energizes the ATP synthase protein to form ATP.


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340.

The eukaryotic cells have all of the followings except

  • peptidoglycan in the cell wall

  • the 80 S ribosome

  • nuclear membrane

  • mitochondria


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